Merge pull request #104 from manufacturing1112/patch-3
Update Day 1_Data_Preprocessing.md
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@ -15,6 +15,7 @@ import pandas as pd
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```
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## 第2步:导入数据集
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```python
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//随后一列是label
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dataset = pd.read_csv('Data.csv')//读取csv文件
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X = dataset.iloc[ : , :-1].values//.iloc[行,列]
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Y = dataset.iloc[ : , 3].values // : 全部行 or 列;[a]第a行 or 列
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